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1,791 species in Theodore Roosevelt National Park
Myurella julacea
Naetrocymbe punctiformis
Neoscona arabesca
Nicrophorus marginatus
Nomada maculiventer
Nomophila nearctica
Notonecta undulata
Noturus flavus
Oarisma garita
Ondatra zibethicus
Orthotrichum pumilum
Amblyscirtes oslari
Passerella iliaca
Peccania subnigra
Perichaena corticalis
Persicaria lapathifolia
Phaeophyscia nigricans
Pheidole pilifera
Phoetaliotes nebrascensis
Pholisora catullus
Phyciodes cocyta
Phymata americana
Physaria didymocarpa
Physarum compressum
Physarum echinosporum
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